Efficient Hydrogen Evolution Reaction in 2H-MoS<sub>2</sub> Basal Planes Enhanced by Surface Electron Accumulation

Vimal Krishnamoorthy; Hemanth Kumar Bangolla; Chi-Yang Chen; Yu-Ting Huang; Cheng-Maw Cheng; Rajesh Kumar Ulaganathan; Raman Sankar; Kuei-Yi Lee; He-Yun Du; Li-Chyong Chen; Kuei-Hsieh Chen; Ruei-San Chen

doi:10.3390/catal14010050

Catalysts (Jan 2024)

Efficient Hydrogen Evolution Reaction in 2H-MoS<sub>2</sub> Basal Planes Enhanced by Surface Electron Accumulation

Vimal Krishnamoorthy,
Hemanth Kumar Bangolla,
Chi-Yang Chen,
Yu-Ting Huang,
Cheng-Maw Cheng,
Rajesh Kumar Ulaganathan,
Raman Sankar,
Kuei-Yi Lee,
He-Yun Du,
Li-Chyong Chen,
Kuei-Hsieh Chen,
Ruei-San Chen

Affiliations

Vimal Krishnamoorthy: Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
Hemanth Kumar Bangolla: Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
Chi-Yang Chen: Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
Yu-Ting Huang: Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
Cheng-Maw Cheng: National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
Rajesh Kumar Ulaganathan: Institute of Physics, Academia Sinica, Taipei 115201, Taiwan
Raman Sankar: Institute of Physics, Academia Sinica, Taipei 115201, Taiwan
Kuei-Yi Lee: Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
He-Yun Du: Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
Li-Chyong Chen: Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
Kuei-Hsieh Chen: Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
Ruei-San Chen: Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan

DOI: https://doi.org/10.3390/catal14010050
Journal volume & issue: Vol. 14, no. 1
p. 50

Abstract

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An innovative strategy has been developed to activate the basal planes in molybdenum disulfide (MoS2) to improve their electrocatalytic activity by controlling surface electron accumulation (SEA) through aging, annealing, and nitrogen-plasma treatments. The optimal hydrogen evolution reaction (HER) performance was obtained on the surface treated with nitrogen-plasma for 120 s. An overpotential of 0.20 V and a Tafel slope of 120 mV dec−1 were achieved for the optimized condition. The angle-resolved photoemission spectroscopy measurement confirmed the HER efficiency enhanced by the SEA conjugated with the sulfur vacancy active sites in the MoS2 basal planes. This study provides new insight into optimizing MoS2 catalysts for energy applications.

Published in Catalysts

ISSN: 2073-4344 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology; Science: Chemistry
Website: https://www.mdpi.com/journal/catalysts

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